Date: Sat, 6 Aug 2016 18:30:19 +0100 From: Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.com> To: Supervision <supervision@list.skarnet.org>, FreeBSD Hackers <freebsd-hackers@freebsd.org>, Debian users <debian-user@lists.debian.org> Subject: nosh version 1.28 Message-ID: <7fa206eb-9b34-de45-4474-11c04007326b@NTLWorld.com> In-Reply-To: <572D266D.6080807@NTLWorld.com> References: <54430B41.3010301@NTLWorld.com> <54B86FD5.3090203@NTLWorld.com> <554E53EF.4080600@NTLWorld.com> <554E93AF.3070709@NTLWorld.com> <556BA130.50708@NTLWorld.com> <55902328.8080602@NTLWorld.com> <55D5CFA2.5010402@NTLWorld.com> <55D8B9AC.6010209@NTLWorld.com> <CADQ2Nw-506S3Gm4s40t%2BWzJu3Wzpwp=wPBWCFoQGZ2yrctCM_w@mail.gmail.com> <56089268.6080007@NTLWorld.com> <56120D11.4080506@NTLWorld.com> <5636C75B.70000@NTLWorld.com> <5672BD8C.50303@NTLWorld.com> <569617F3.8000101@NTLWorld.com> <56AEAED5.4010606@NTLWorld.com> <572D266D.6080807@NTLWorld.com>
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The nosh package is now up to version 1.28 . * https://jdebp.eu./Softwares/nosh/ * https://www.freebsd.org/news/status/report-2015-07-2015-09.html#The-nosh-Project * http://jdebp.info./Softwares/nosh/ There's a lot in this one: MySQL and MariaDB changes; more prophylaxis for Desktop Bus bus activation; improvements to systemd unit conversion; support for the old svc -x; machineenv; improvements to service management; fixes for the per-user manager; improvements to the console terminal emulator; BSD boot mode changes; the ability to pass more open sockets to connection-accepting programs; cron; and OpenBSD. Italics and colour ================== * https://jdebp.eu./Softwares/nosh/italics-in-manuals.html This isn't a toolset change, per se. But the WWW site now has a guide to seeing actual italic text in manual pages. The nosh toolset's user-space virtual terminals support true italics (if one has the fonts) or obliquing, and this works with them. MySQL and MariaDB changes ========================= * https://jdebp.eu./Softwares/nosh/mariadb-and-mysql.html New in version 1.28 is a different and up-to-date way of managing MySQL and MariaDB server services — where "new" translates to finally getting rid of that unnecessary mysql_safe wrapper and doing things the way that daemontools-family toolset users have wanted to do them since the turn of the century. There's a lengthy exposition on the WWW site, q.v.. The major visible effect is that your "mysql" or "mariadb" service is now an alias, for something like a "mysql@" or "mysql@01" (if you have [mysql01] in your my.cnf) service. The configuration file import mechanism tries to construct/update mariadb@NN and mysql@NN service bundles for you, based upon your MariaDB and MySQL configuration files. Further prophylaxis for Desktop Bus bus activation ================================================== * https://jdebp.eu./Softwares/nosh/avoid-dbus-bus-activation.html The nosh toolset now comes with a dbus-daemon-launch-helper replacement. The purpose of this is to sit in your /usr/local/etc/dbus-1/system.conf (or equivalent) and redirect to service management attempts, by the Desktop Bus broker daemon, to demand-start services. It is slightly fiddly to install, requiring manual setup by the system administrator, there being no simple way to add overrides to /usr/local/etc/dbus-1/system.conf and it requiring that you allow the "messagebus" user the necessary access for starting and stopping services (but not necessarily *superuser* access — rembember ACLs). To assist with this, several popular Desktop Bus "services" now exist as alias names for service management services. These are just symbolic links to the service bundle directories, of course. So, for example: With the helper in place, Desktop Bus bus activation will try to demand-start a service named "org.freedesktop.PackageKit" using service management. This is just an alias for the "packagekit" service. Improvements to systemd unit conversion ======================================= Ideal mode is now closer to the daemontools-family mainstream, defaulting to the daemontools-family norm of always restarting services. Quirks mode, conversely, now implements more of the non-daemontools redirection semantics for standard I/O, in particular with regard to listening socket units. Some more Linuxisms have been added. Limits (where applicable) can now take SI and IEC suffixes (so you can, say, express limits in kiloseconds). This latter is actually an augmentation to the underlying softlimit command. Passing more open sockets to connection-accepting programs ========================================================== The improvements to systemd unit conversion also allow passing more than one listen()ing socket to connection-accepting programs. You can use, say, ListenStream and ListenDatagram and the conversion utility will translate this into an appropriate chain of multiple invocations of udp-socket-listen and tcp-socket-listen. It will do local-stream-socket-listen, local-datagram-socket-listen, netlink-datagram-socket-listen, and fifo-listen too. The motivator for this was Daniel J. Bernstein's dnscache. I have modified versions of tinydns, dnscache, and taiclockd that understand the LISTEN_FDS protocol for their being told about listening sockets that have been opened for them, and don't open their own sockets in that case. dnscache, in particular, takes a UDP socket and a listening TCP socket. The UCSPI tools in this version of the toolset can now provide these two to a dnscache process. One simply chains through udp-socket-listen and tcp-socket-listen to dnscache, using the --systemd-compatibility flag. The sharp-eyed will notice that the tinydns and dnscache services are following in the footsteps of the mariadb and mysql services, being instantiated for relevant IP addresses by the configuration import subsystem instead of being single-instance services. It's not quite ready in this version, but you can see where things are headed. svc -x ====== The -x option to service-control, a.k.a. svc, is no longer defunct. It does what unload-when-stopped does. machineenv ========== This was a little helper that was needed for running one particular Java program under nosh service management. It's analogous to userenv, but instead of setting up environment variables from login information it sets up environment variables from machine information. Improvements to service management =================================== The system-control utility now respects a new "use_hangup" flag in service directories, as documented in service-manager's manual. This is used in the various getty@, agetty@, mgetty@, emergency-login@, and ttylogin@ service bundles, and causes system-control to attempt to bring down these services (at shutdown, for example) with SIGHUP, because some job control shells ignore SIGTERM and that delays shutdown. Incidentally: There's now a family of pre-supplied agetty/mgetty/getty@ service bundles, set up for the various conventional serial terminal devices on OpenBSD, FreeBSD/PC-BSD, and Linux. These are aliased from parallel ttylogin@ names, for consistent handling of /etc/ttys import and so forth. They run a modem-aware getty, though; which of course the virtual terminal ttylogin@ services do not. See the Terminals chapter of the nosh Guide. Fixes for the per-user manager ============================== The per-user manager, an instance of which you get when you run "system-control start user@${USER}" (or, more specifically, "system-control start user-services@${USER}"), is now more functional. The configuration importer sets you up with your own personal service bundle directory tree in ${HOME}/.config/service-bundles/ with a pre-supplied exit/ service bundle. (Don't delete it! The per-user service manager needs to have a goal when it is signalled to terminate.) Improvements to the console terminal emulator ============================================= SoftTerm has a bugfix. CUF and CUF no longer cause sideways scrolling. It also now understands some of the more esoteric control sequences from the old (pre-version 10) FreeBSD kernel terminal emulator, increasing the compatibility with programs that use the "cons25" terminal type. The NetBSD terminal type for virtual terminals is now pcvtXX, and the OpenBSD one is pccon, per the 2015 termcap database. There is also a minor fix in the SCO Console mode emulation. All of the function key control sequences were off by one. They are not, now. (-: BSD boot mode changes ===================== * https://jdebp.eu./FGA/emergency-and-rescue-mode-bootstrap.html I'd like to see FreeBSD and PC-BSD kernel loaders support the -b flag. In the meantime, for simple utility, I've changed the -s flag to invoke emergency mode rather than rescue mode, but only on FreeBSD/PC-BSD. OpenBSD ======= One of the servers providing the new WWW site is an OpenBSD machine, running the aforementioned modified versions of Bernstein tinydns and dnscache, and Bernstein publicfile, under nosh service management. The nosh toolset now builds and runs on OpenBSD 5.9. There are an awful lot of limitations to OpenBSD, from lack of realtime signals and nmount() to its older packaging tool. Some of them are surmountable: I could write an nmount() shim function as I did for Linux, although for OpenBSD it would be a lot more complex. Some of them, like the lack of fexecve(), are not. In concert, they preclude nosh as a system manager and packages with full automatic setup and teardown of basic system services. But one can run the nosh service manager under OpenBSD rc; and everything else, from UCSPI servers to cron, under that. I currently do. I'm not particularly bothered about the package tool and the missing setup/teardown of the binary packages, myself. I'm not running my system using installed binary packages in the first place. I'm building from source, in true slashpackage style, into /package/admin/*/command/ and symbolically linking from /usr/local/bin/* to there. The user-space virtual terminal system has not been tested on OpenBSD, and almost certainly doesn't quite work yet. As mentioned earlier, the OpenBSD terminal type is set correctly by vc-get-tty. But console-terminal-emulator does not have an OpenBSD mode yet; console-fb-realizer doesn't really know how to use OpenBSD HID devices yet; and OpenBSD has the old 1980s-style pseudo-terminal management system instead of the "new" "UNIX98" 1990s one, which I have not tested. At one point I was in a halfway-done position of having the nosh toolset's UCSPI tools but none of the service bundles. So the toolset now has a tcpserver shim, that simply maps onto tcp-socket-listen, ucspi-socket-rules-check, and tcp-socket-accept. It does not have the same defaults as the Bernstein tcpserver, though; and is in a separate binary package. The cron mess ============= OpenBSD has yet another not-quite-the-same version of cron, with yet another way to tell it not to uselessly fork. So now there's an openbsd-cron service bundle alongside the debian-cron and vixiecron service bundles. The cron alias is set up to point to the right one for the operating system. debian-cron is the new name for the gnucron service bundle, by the way. "Debian/GNU Linux's prepackaged version" is what Ian Jackson originally called it in its README. (Historical tidbit: Paul Vixie originally named his "PD cron".) As far as I can tell, GNU cron was actually a project (by one Mike Meyer it appears) for the Free Software Foundation in 1987 that has entirely disappeared, if it ever existed in the first place. In any case, "gnucron" is too generic a name for something that is at this point heading down the road of needing an individual service bundle for every single special flavour. (Perhaps the Google Summer of Code people could add importing OpenBSD's cron's -n flag to FreeBSD cron to their list of ideas. That would eliminate one special flavour and fix a deficiency at the same time.) Thibault Godouet's fcron, Matt Dillon's/Jim Pryor's dcron, and Bruce Guenter's bcron don't need special treatment like this.
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